donisthorpe



PATENTEDSEPT. 22, 1868.

G. E. DONISTHORPB. GOAL CUTTING MACHINE.

2 SHEET B-BHBET 1.

PATENTED SEPT. 22, 1868. G. E. jDONISTHORPE. I GOAL CUTTING MACHINE.

2 SHEETS-SHEET 2.

gnitzh tans gaunt Hire.

GEORGE EDMUND D'ONISTHORP'E, OF LEEDS, GL ND,

.mrnovsn GOALFGUTTING mourns."

fit: some terms in in these Bitters haitnt ant making part of for samt.

TO ALL TO WHOM IT'MAY CONCERN:

Be it known that I, Gnonen Enmmn Domsrnoers, of Leeds, in the county of Yorl5, En lan'd,'top and nail-manufacturer, a subject of the Queen of Great Britain, have invented or discovered new and useful Improvements in Getting Coal and other Minerals, and in Machinery Employed for that Purpose and i, the said GEORGE EDMUND DONISTHORPE, do hereby declare the nature of the said invention, and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement thereof; that is to say Heretofore it has been proposed to employ machines for cutting grooves, either into or above or below the coal or mineral, to facilitate its being got.

Now, this invention has for its object the steadying-mnchines employed for cuttingsuch grooves whilst they are at work. For this purpose 1, according to one arrangement, first cut into the roof'of the mine a shallow groove ht a short distance from the face of the coal, that is, being worked and parallel with it,-and from-this green in the roof I obtain the requisite holding for steadying the machine, and preventing it from being forced back away from the face of the coal into which the grooves areheing cut. Wheels or guides at the topof the machine may, for this purpose, be caused to run in the gr'oove in the roof, or wooden beams or rails may be fixed in the groove, and the requisite holding or steadying of the machine be obtained from these beams or rails.

In order to cut the groove in the roof, I employ a truck or carriage, which runs on the rails uponwhich the machine for cutting the horizontal grooves in the coal is to travel. This truck or carriage carries a cutter, to which a reciprocating 'to-end-fro motion is, by preference, given, and as the truck moves along the'ruils, the cutter is caused to form the groove along the roof of the mine, and since an equal length of stroke is at 21-11 times given to the cutter, the bottom of the groove in the roof will be parallel with the rails.

A similar machine may be employed'for forming grooves in the floor of the mine into which the rails upon which the machine is to run are to be inserted. In some cases, in place of forming a continuous groove along the roof, I bore holes-into the roof at intervals apart, and then, in order to steady-the cutting-machine when at work, I cause the upper ends of pillars or uprights from the carriage or bed of the machine to be inserted into the 'holes, and thus hold the carriage fast. In this case thecarriage or bed of the machine is formed with slides or guides, upon which the portion of the machine which carries the" tool or tools for cutting thegrooves into or above or'bel'ow the coal on mineral, is capable of sliding, in order that they may be moved forward progress ively, to enable them to form the groove or grooves. When this sliding portion of the machine has travelled from one end of the bed or cnrria e to the other, the bed or carriage is moved forward'a distance, and is then O again held fast by means of fresh holes in the roof.

In the'drawings hereunto annexed, I have shown a machine such as is above described, for cutting grooves in the roof ofa mine. I

Figure 1 shows a side view of the machine,

Figure 2 an end view, and.

Figure 3 a plan a is the framing of the truck or carriage, which is supported on wheels 6, which are to run on the rails upon which the machine used for cutting the-grooves into or above or below the-seam of coal is to travel. At the front end of the carriage is the cylinder c of a small air-engine. The upper end of the piston-rod of this engine carries the cutter which is to cut the groove into the roof, and in order that'this cutter may be raised or lowered to bring it to the proper height for cutting a groove of the desired depth in the roof, the upper end of'the piston-rod is made tubular,- to receive the stem of the cutter, and a screw-thread is cut on this stem, which screws into a nut, d, as shown.

The screw-stein of the cutter is prevented from turning by a feather, e, and the nut 02 has handles upon it by which it csnbs turned, when it isdesired to rhise or lower the cutter. p v i In order to work the slide-valve of the engine, the mans-no motion of the piston-rod gives arctarymotion to the axisf inthe manner showmland motion is communicated to the valve from an eccentric, f, on thisaxis; or the'slide-valve canbc disconnected from the eccentric, and be worked by the hand-lever g. The working the valve from an eccentricipsures the cutter always cutting-to an even depth into the roof, as the cutter ceases towork unless each bl oivgi'lcpby it is of suflici'ent strength to enable it to complete its'stroke. As the cutter is being moved to and fro, the truck or carriage is simultaneously slowly moved forward a ong the rails by a toothed wheel, h, gearing with a rack fiormed in the face of one of thorails. The toothed wheel is for this purpose turned by a worm, k, which has on its axis a hand-wheel, k, as shown. l'.he toothed-wheel h and worm is are carried by a slide, which can be raised or lowered on the frame of the carriage or truck, by turning the screw Z. The toothed wheel 71 can thus be raised out of gear with the rack formed in the face of the rail, when it is ilesiredto shift the machine from place to place. In order to steady the machine when at work, the back of the-truck carries an air-cylinder, fitted with a p ston or plunger, which carries at its upper end a roller, and the plunger presses this roller against the roof of the mine when'thc machine is at work.

When a groove his been cut in the roof of a mine, I employ it for steadying the machine, which is to cut a groove or groovos'into or above or below the seam of cool, by pi'eference, by causing a strip or feather, carried by the machine to enter the gfoove and slide along it as the machine moves forward, and by'this means I prevent the machineirom being driven back away from' the foce of the coal into which it is cutting a groove or, grooves, or place of this arrangement strips or beams of wood or metalmay, as above mentioned, be placed in the groom, and the machine may then be steadied by flanged pulieys, carried bythe machine being caused to run on these strips or beams, or other arrangements may be resorted to for steadyinghhe cutting-machine, by a groove in the roof. v

When cutting a groove into or above the seam of coal close to' the roof of the mine by a machine, the cuttingapparatus of which" is carried on the top of the plungers of an air-cylinder,'so-that the cutting-apparatus is pressed up constantly against theroof of the mine, I, by preferonce,atthch to the frame that carries the cutt'ers, a. strip or feather to run in the groove in the roof, and place on each side of this feather rollers, which are to bear against thereof. The groove formed by the cutters ,will thus follow the line of the root, and at the same time the machine wili'be steadied by the feather, which is received into the groove. If such a mnchinebe employed for cutting a groove below the seam of opal, or near to the floor of the mine, theuI in a similar man-. ner employ a groove in the door oi" the mine to steady the machine.

A machine for cutting grooves -into the door of the mine may be constructed in a similar manner to the machine shown in the drawings for cutting. grooves into the root, and such a 'machine may also be employed, for cutting grooves in the floor, to't'acilitate the fixing of the rails upon which the cutting-machine is to run' The cutter shown in the drawings is suitable for cutting grooves; when, however, it is desired to cut in the floor or roo'i', then a suitable boring-tool isnemployed, and provision is made for giving a partial rotation to the tool after each stroke or blow, as is well understood.

Having thus described the nature of my invention, and the manner of performing the. same, I would have it understood that what I claim, is- 4 Y '1. The combination, substantially as set'forth, of the rack on the rail, the geared pinion, the worm, and

the band-wheel, with the lifting-screw Z, whereby the feeding-devices on the carriage may be released from the rail.

2. The combination, substantially as set forth, of the carriage, the feeding-mechanism, the guidingmechanism, and thacntting-mechonism, for the purpose set forth. 7

3. The combination, substantially as set forth, of the carriage, the cylinder, the cutter connected directly with the cylindez, and the mechanism for controlling the induction-valve of the cyiinder, whereby the valvc'is not wholly opened unless the cutter makes a full stroke, and, consequently, the depth of one cut regulates this force applied on the next stroke of the cutters.

4. The combined arrangement of apparatus herein described, for cutting grooves or holes into the floor or root of a mine. D

' G. E. DONISTHQRPE.

Witnesses:

W. H. COWLEY, 

